accelerating and decelerating phrases in Arrested Motion.
Arrested Motion is based on the first pattern in the chosen series (Slonimsky 85). The intervals of this pattern are transposed to create a large collection of self-similar patterns across a pitch continuum of two octaves. These are arranged to occupy a series of slots derived from the modulation of a sine wave by a ramp wave, a device first used in the composer’s Array (1994) for solo violin, and later in 4th of the Four Commentaries for piano and violoncello (2007). Phrases within this movement are broken up by pauses of indeterminate length, following which the player is invited to change tempo, timbre and style of playing.